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ASME/ANSI B18.13.1M-4-1998
Metric cross recessed oval head screws and countersunk serrate lock washer assemblies-Table 4
Nom
P
dk max
dk min
k max
f
M
No.
t
h max
h min
M3.5
0.6
7.3
6.9
2.3
0.8
4.38
2
2.48
0.45
0.3
M4
0.7
8.4
8
2.7
1
4.92
2
2.99
0.55
0.4
M5
0.8
9.3
8.9
2.7
1.2
5.66
2
3.74
0.65
0.5
M6
1
11.3
10.9
3.3
1.4
7.3
3
4.26
0.65
0.5
M8
1.25
15.8
15.4
4.6
2
9.86
4
5.81
0.7
0.55
M10
1.5
18.3
17.8
5
2.3
11.24
4
7.15
0.85
0.7
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